Matthew the camera draws 2A from the power supply, that power supply must be able to supply at least 2A or it will not work.
So you can use any power supply that can supply greater than 2A, so you could use a power supply that can deliver 25A and it will not damage the camera (just make sure its a 12V supply).
That is what I use in the Observatory a 25A 12V supply that delivers power to everything, camera, mount, dew heaters etc.
Cheers
Bill
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